Trolley.



I No. '763,759- PATEN'IED JUN 28, 1904.

Gri A. HUNSINGER & E. DBWALD. TROLLEY.

APPLIOATION FILED JAN. zo, 1904. No MODEL.

2 SHEETS-SHEET 1.

No. 763,759. PATENTED JUNE 28, 1904.y G. A. HUNSINGER & E. A. DBWALD.

TROLLEY. APPLICATION FILED JAN. zo, 1904.

2 sHEBTs-sHEBT N0 MODEL.

Tus Nonms #Evans co. Puorou'mo., wAsmrmTqN, u. z.

No. rede.

UNITED STATES" Patented June 28, 1904.

PATENT OFFICE.

GEORGE A. I-IUNSINGER AND EDWARD A. DEW ALD, OF ALLEGHENY,

PENNSYLVANIA.

TROLLEYl SPECIFICATION forming part of Letters Patent No. 763,759, dated June 28, 1904.

' `Ap"picati0nfi1ed Jimmy 20,1904. serial No. 189,934. momen.)

To all whom- 15 may @0n/cern.'

Be it known that we, GEORGE A. HUNSINGEE, a citizen of the United States, and EDWARD A. DEWALD, asubject of the Emperor of Austria- Hungary, both residing in Allegheny, in the county of Allegheny and"State of Pennsylvania, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference being had therein to the accompanying drawings.A

rlhis invention has relation to trolleys for electric cars, and has for its object the provision of novel means for preventing the trolley from leaving the wire from which the current is derived to operate the electrical mechanism or' the car.

In carrying our inventioninto effect we arrange upon top of the trolley-pole, and preferably upon the harp of the trolley, two sets of swiveled arms, each of which carries upon its top a wheel. rIhe wheels, which under normal conditions rest in contact with the wire, are maintained in this position by suitable springs attached to the swiveled arms,

and we provide means whereby the said swiveled arms may be separated when it is desired to free the trolley Jfrom the wire, such means being operable from the car or from the ground.

In the accompanying drawings, Figure lis a side elevation of our improved trolley. Fig. 2 is a front elevation of the harp and its attachments. Fig. 3 is a side elevation of the same. Fig. 4 is a top plan view of the same.

A trolley-pole P is pivotally mounted upon a swiveled base p and attached to a spring p2, by means of which the pole is maintained in elevated position, these parts being of the usual construction.

The trolley-pole has a head N screwed on its upper end, and said head carries the harp A, and the harp is pivotally secured upon the head by a cross-boltL and a Cotter-pin M. A trolley-wheel E is journaled on a bolt J, which is secured in position in harp A by the cotter-pin K, the said trolley-wheel being of the usual form and having a deep groove in its periphery to receive the trolley-wire. Upon each side of the harp A we attach bcaring` boxes G G, which arc formed with verticallydisposed bearing oriiices that receive the round vertical lower end or extension Gl of substantially L-shaped arms B, the vertical portions of which extend beyond the top of the harp and each carries a wheel C, in the grooved periphery or' which is seated a ring D, of rubber or other similar material, these rubber rings on adjacent Wheels contacting when the wheels are drawn together by spiral springs F F, attached to the swiveled arms B. Arms B B are carried on the lower ends of the extensions G G of the arms B, these arms B' Bl being so disposed that they will project somewhat at opposite angles from the sides of the harp, as shown in Fig. 4T, and to the end ofeach arm B' a cord R is fastened, the two cords on each side of the trolley passing beneath friction-rollers H H, suitably mounted on the sides of the harp and leading to a suitable point on the car.

A clevis H is formed on the front edge or' the harp A, and a rod P is pivotally attached at its upper edge to the clevis and at its lower end is pivotally attached to an arm S, attached to a head S, which is extending upwardly from the trolley-base, this arm serving to maintain the top of the harp and all of the wheels C on a horizontal plane.

Operation: Under normal conditions when a trolley is on the wire the latter passes over the wheel E and beneath the abutting rubber ring D, and the trolley-wheel is thereby prevented from coming oi the wire. When the trolley is to be removed from contact with the wire, the wheels C C on both sides of the harp are simultaneously spread apart by drawing down the cords R R. Further tension on the cords R R will bring the arms G G' into contact with the sidesoi` the harp and will draw the trolley downwardly and away from the wire, when it can be swung around and replaced, the wheels C C being drawn together after the trolley-wheel rests against the wire, and the traction on the cords R R is released by the spiral springs F F.

Having described our invention, we claiml. In a trolley the combination of a pole, a harp hinged upon said pole, a trolley-wheel journaled in said harp, a rod connecting the harp with a fixed member arranged on the pole, a plurality of swiveled arms mounted on each side ofthe harp, Wheels mounted on said swiveled arms, springs attached to the swiveled arms and adapted to spring the Wheels on one side of the harp into Contact With the Wheels on the other side of the same, and flexible connections attached to each of said swiveled arms and passing through guides on the sides of the harp, said flexible connections being adapted to spread the arms on opposite sides or' the harp apart so that the trolley can be freed from the Wire.

2. In a trolley, the combination of a trolley-pole, a harp carried by said pole, a trolleywheel mounted in said harp, pivoted arms carried on the harp, Wheels journaled on the ends GEORGE A. HUNSINGER. EDWARD A. DEVALD. Witnesses:

JOHN M. WENDT, JOSEPH C. NIST. 

